(b) 0.11 g of NaCl+ 100 g of water References to Educational Sites and resources. Corrosion is a chemical change because rust is a chemical compound (hydrated iron oxide, Fe203 -*H20) which is totally different from element iron (Fe). If yes, then describe the procedure. Change ), You are commenting using your Google account. All the questions are important for class unit tests and school’s terminal exams. HCI to form H2(g) which burns with a ‘pop’ sound if burning match stick is brought near it. (c) A mixture of chloroform and water taken in a separating funnel is mixed and left undisturbed for some time. difference in boiling points. (c) corrosion and it is a chemical change (b) A pure substance is one which is made up of only one kind of atoms or molecules. Carbonic acid. (b) It is chemical property because chemical reaction takes place between zinc and hydrochloric acid Method Chromatography method can be used to separate two different substances present in the Only pure substance has sharp melting point. Dilute hydrochloric acid was added to both the parts and evolution of gas was seen in both the cases. Decantation is the process by which sedimented liquid is separated by pouring it in the other container very slowly without disturbing the settled sediments at the bottom of the container. Thus, in the light of the above law, it will be a pure substance. But on dry heating sugar gets charred and (b) 7. Question 12: (b) Physical change because it is also involving only movement of air, no change in composition of air. (g) Carbon (i) Sulphur powder. (a) (i), (ii) and (iii) (b) (i), (ii) and (iv) Very nice questions for exam in this website cbsencertsolution.com, For best view of this site use Google Chrome, Class IX, Science (Chemistry) CBSE Guide - CBSE Questions, Question.1: Which one This is due to the scattering of light by milk and the phenomenon is called Tyndall effect. Answer: Q. (e) Aluminium (f) Iodine In rusting of iron, its chemical composition is changed. (a) Drying of a shirt in the sun. (c) Two immiscible liquids. (b) Can you prepare one acidic and one basic solution by using the products formed in the above process? Explain using a diagram. Answer: (iv) Get sodium chloride by evaporation or crystallisation. Answer: colloidal solution out of the following: (a) gold ornaments (b) sand grains (c) (c) It is physical property because cutting with knife does not form new substance. It means this sample contains impurities. (b) Name a non-metal which exists as a liquid at room temperature. (a) Example Mixture of acetone and water. (a) Aluminium(b) Silicon(c) Graphite(d) Gold, Free Online MCQ Questions for Class 9 Science Chapter 2 – Is Matter Around Us Pure, 1. A pure substance is made up of only one kind of particles like elements. (b) This process is diffusion because in diffusion, mixing of one substance (ink) into another substance Suggest some other technique for the same? Class 9, NCERT (Chemistry) | Is Matter Around Us Pure | Multiple Choice Questions (MCQ) Class IX, Science (Chemistry) CBSE Guide - CBSE Questions . Chapter-2, Is Matter Around Us Pure. (a) The phenomena given in question is a chemical change because the composition of product formed is different from the substance taken. Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixed together. The filter paper was removed when the water moved near the top of the filter paper. The teacher instructed three students ‘A’, ‘B’ and V respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). This column is provided with some glass beads in it. Answer: Activity 2.2 NCERT Class 9 Science Is Matter Around Us Pure. Question 18: Answer: (i) The product A2B shows the properties of substances A and B. (c) Common salt, water and sand are separated by Answer: As the given element is sonorous and highly ductile, therefore, it is categorised as a metal. Student ‘B’ dissolved 50 g of NaOH in 100 g of water (solvent), which is incorrect. (a) (i) and (ii) (b) (ii) and (iii) NCERT Solutions Class 9 Science Chapter 2 Is Matter Around Us Pure – Here are all the NCERT solutions for Class 9 Science Chapter 2. (vii) It should be hard (except sodium and potassium which are soft metals). (c) element (d) none of these, Question.15: (d) A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called…………… (i) Pure substances contain only one kind of particles. (a) Fog (b) Cheese (c) Coloured gemstone Answer: (a) Fog—liquid, gas (b) Cheese—liquid, solid (c) Coloured gemstone—solid, solid. Answer: (i) Remove iron filings with the help of magnet Give some examples of Tyndall effect observed in your surroundings? suspension. (c) solid in liquid (d) gas in solid, Question.12: A One spatula full of copper sulphate. Your email address will not be published. In the given question, student ‘C’ has made it correctly because 50% (mass by volume) (a) similar (b) slightly different (c) entirely different (d) different 2. (a) Boron(b) Silicon(c) Germanium(d) Tungsten, 5. (c) Colloidal solutions are heterogeneous in nature, though they appear to be homogeneous. aerated water (c) soil (d) blood, Question.6: (c) Suggest one more application of this technique. Save. But opting out of some of these cookies may have an effect on your browsing experience. When dilute HCI is added to part A, FeS will react with dil HC1 to form FI2S gas which has smell of rotten eggs and will turn lead acetate paper black. (d) it can not be broken Question 19: When the liquid is spun rapidly, the denser particles are forced to the bottom and the lighter particles stay at the top. (d) One of the components changes directly from solid to gaseous state. Answer: Answer: Students can solve NCERT Class 9 Science: Is Matter Around Us Pure Multiple Choice Questions with Answers to know their preparation level on Success Roar Classes Website itself. Colloids are actually heterogeneous in nature though they appear to be homogeneous. water because common salt is soluble in water whereas sand is insoluble in water. Question 3: (b)Example Mixture of kerosene and petrol. We have Provided Is Matter Around Us Class 9 Science MCQs Questions with Answers to help students understand the concept very well. Iron filings and sulphur were mixed together and divided into two parts, ‘A’ and ‘8’. The ‘sea-water’ can be classified as a homogeneous as well as heterogeneous mixture. (iii) The product so formed cannot be classified as a compound. (b) Two volatile components with appreciable difference in boiling points. In distillation flask, acetone will boil at 56°C and change into vapours and can be collected in flask after condensation. Answer: What would you observe when Only the separation of components takes place by the physical phenomenon, centrifugation. Zn(s)+ 2HCI (dil)→ ZnCI2(aq) + H2(g) (ii) It should be good conductors of heat and electricity. aerosol (d) soil. means 50 g of solute for every 100 mL of solution and not in 100 mL of solvent. Complete CBSE Guide, chapter wise NCERT Solutions, CBSE Notes, Guess and Sample Questions from NCERT Textbooks with their answers for Class 7 - 12.
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